Jacqueline West (wfe costume designer) mentions Rob in an Interview with Vogue

How closely do you work with actors?
Reese was very involved with creating a look for Marlena with [director] Francis [Lawrence] and me. We watched 30s films together and pored over hundreds of stills. She studied women’s postures, stances, body language. They even smoked differently. Rob [Pattinson] was wonderful in that way too.